# MTLRenderPipelineReflection Information about the arguments of a graphics function. ``` class MTLRenderPipelineReflection ``` ## Overview The [`MTLRenderPipelineReflection`](/documentation/Metal/MTLRenderPipelineReflection) class is an interface that represents the parameters for the shaders in a render pipeline state (see [`MTLRenderPipelineState`](/documentation/Metal/MTLRenderPipelineState)). Each pipeline state can include object, mesh, vertex, fragment, and tile shaders. You create a reflection instance at the same time as the pipeline state that it represents by calling the appropriate [`MTLDevice`](/documentation/Metal/MTLDevice) method. For example, the [`makeRenderPipelineState(descriptor:options:reflection:)`](/documentation/Metal/MTLDevice/makeRenderPipelineState(descriptor:options:reflection:)) and [`makeRenderPipelineState(descriptor:options:completionHandler:)`](/documentation/Metal/MTLDevice/makeRenderPipelineState(descriptor:options:completionHandler:)-5gdww) methods create the pipeline state and the reflection instances at the same time. > Important: > Only create reflection instances if you need them because each one can require a significant amount of memory. For more information, see [Pipeline state creation](/documentation/Metal/pipeline-state-creation). ## Topics ### Inspecting a shader’s parameter [`fragmentBindings`](/documentation/Metal/MTLRenderPipelineReflection/fragmentBindings) An array of binding instances, each of which represents a parameter of the pipeline state’s fragment shader. [`meshBindings`](/documentation/Metal/MTLRenderPipelineReflection/meshBindings) An array of binding instances, each of which represents a parameter of the pipeline state’s mesh shader. [`objectBindings`](/documentation/Metal/MTLRenderPipelineReflection/objectBindings) An array of binding instances, each of which represents a parameter of the pipeline state’s object shader. [`tileBindings`](/documentation/Metal/MTLRenderPipelineReflection/tileBindings) An array of binding instances, each of which represents a parameter of the pipeline state’s tile shader. [`vertexBindings`](/documentation/Metal/MTLRenderPipelineReflection/vertexBindings) An array of binding instances, each of which represents a parameter of the pipeline state’s vertex shader. ### Deprecated [`vertexArguments`](/documentation/Metal/MTLRenderPipelineReflection/vertexArguments) An array of argument instances, each of which represent a parameter of the pipeline state’s vertex shader. [`fragmentArguments`](/documentation/Metal/MTLRenderPipelineReflection/fragmentArguments) An array of argument instances, each of which represent a parameter of the pipeline state’s fragment shader. [`tileArguments`](/documentation/Metal/MTLRenderPipelineReflection/tileArguments) An array of argument instances, each of which represent a parameter of the pipeline state’s tile shader. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)